Snubbed truck



Spt. 2, 1958 w. L. SCHLEGEL, JR 2,849,964

SNUBBED TRUCK 2 sheeis-sheet 2 Filed Juni s, 1952 IN V EN TOR. 24x/Ln dc'agef,

O @mi United States Patent@ SNUBBED TRUCK Walter L. Schlegel, Jr., Chicago, Ill., assigner -to Amerian Steel Foundries, Chicago, Ill., a corporation of New ersey Application June s, 1952, serial V10.291,496

s Claims. (ci. `iosa-197) ,This invention relates to railwayV car'trucks and more particularly .to a truck .embodying novel snubbing means for dampemng oscillations of a truck bolster upon its y supporting springs. l

This invention further contemplates the provision 'of a spring plankless freight car truck construction comprising a bolster resiliently supported upon relatively movable side frames, the bolster and vside frames being "engaged against relative movement byy means of friction shoes disposed between each side frame and the ends of the bolster.

This invention further contemplates the provision of (a4 truck construction in which a pair of friction shoes` are disposed at opposite sides of each bolster end to ,restrain movements of the bolster relative to the side frames, each pair of shoesbeing urged into frictional engagementvbetween the bolster and side frame by means of resilient means associated with one of the shoes. This inventionfurther contemplates -the provision o f a `railway car truck construction embodying relatively 4movable side frame and bolster members, one of said members having pockets to receive friction shoes for frictional engagement against wear plates provided on the other of said members.

This invention embodies other novel features, details of construction and arrangements of parts which arelhereinafter set forth in the specicationand claims and illustrated in the accompanying drawings, wherein:

(Figure L1 `is a fragmentary sectional view taken along theline 1 1 of Figure 2 illustrating a truck construction embodying features of the .present invention;

:Figure 2 is :a transverse sectional view taken along the line2-2 of Figure l;

Figure 3 is a fragmentary sectional View taken along .the line 3 3 of yFigure 4 illustrating a modified form of ythe present invention;

Figure 4 is a transverse sectional view taken along the line 4-4 of Figure 3;

Figure Sis a fragmentary sectional view taken along the line 5 5 of Figure 6 illustrating another modified form of this invention, and

lFigure 6 is a transverse sectional view taken along the line 6 6 of Figure 5. l f

Referring now to the drawings for a better understand- :ing of the present invention and more particularly to Fig- .ures l and 2 therein, the truck is shown as comprising a ybolster member 2 resiliently supported at its ends upon spaced side frame members 4, only lone end of the bolster being shownand described as the other end of the bolster and its associated side frame is identical in construction.l

The side frame-4 is shown as comprising a compression member -6, a tension member 8, and spaced columns l10-16` dening therewith a bolster opening 12 for the reception of one end of the bolster 2 which is adapted 'to be resiliently supported upon 4the side frame byfmeans '-'ofa group of compression springs 16 interposed between the bolster and the tension member. Each side of lthe Patented Sept. 2, 1958 r* i f ICC .bolster lis provided ywith inboard and outboard guide lugs 18-18 and, 20-`20, respectively, for sliding engagement with the associated column10, the lugs normally affording an interlock between the bolster and side frame when the .springs 16 .aremdisposed on the tension member to support the bolster. Upon removal of the springs 16 vit will ybe noted that the end ofzthe bolster may be lowered and thenwithdrawn from the widened lower end ofthe bolsterA openingl 12. i

The bolster 12g-is of box section comprising top and bottom walls 22 and`24 and spaced side walls 26 and .28

.extending vtherebetween'. The side walls..26 and 28 are l formed with pockets 30 and y.32, respectively, between the lugs 18 and 20 to receive friction lshoes 34 and 36, respectively, forl engagement against wear plates 3S and 39 secured onthe columns 10V-m10'.y The pocket 30 =is dened by inclined webs 40-42 and spaced inboard and outboard webs 44 and '46, respectively. The webs 40--42 are joined to the top and bottom walls 22 .and 24, respectively, and converge Vinwardlykand merge to deline a generally V-shape recess. The inboard and outboard edgesof the webs `40 and 42 are joined to the inboard and outboard webs 44 `and 46 which, in turn, are joined to the side wall 26 and `top and ybottom walls 22 and 24. 'e

They pockety 32 is defined by spaced inboard and outboard webs 4S and50 and a vdiagonal web 52. The webs 48 and Sil are joined to the top, bottom and side walls. The diagonal web 52 is joined to .thebstop wall 22 and slopes downwardly and inwardly to merge with the bottom wall 24. The inboard and outboard edges of the diagonal web merge with ythe inboard and outboard -we'bs 48 and Si), respectively.

side with a flat-vertical face 54 to engage the adjacent wear plate .38, and thas its other side formed vwith ilat diagonal `surfaces 56 and 58 complementary to the outer surfaces .of the webs 40 and 42, respectively. The friction shoe 36 is formed with a ilattverticalface 60 to engage the -wea'r plate 39, and has itsy opposite side formed with a diagonal surface 62 complementary to the outer face ofthe diagonal web 52. A compression spring '64 is Aseated fon the tension vmember 8 to engage the bottom'side of the shoe 36 to urge lthelatter between the web 52 and adjacent wear plate 39. lt will be noted that upward movement of the wedge shape shoe -36 acts to move the bolster laterally to press the friction shoe 34 into tight frictional engagement against the wear plate 38.

Figures 3 and 4 in the drawings illustrate a modied form of this invention in which each end of a bolster 2a is formed with a pocket 66 to kreceive atpair of similar vertically 'aligned friction shoes 6'5-65. The pocket is defined by vertical inboard and outboard: webs 67 and 68 joined to the top wall 22, bottom wall 24 and side wall 28 of the bolster, `and merging with spaced'` guide webs 69 and 7 il, respectively, which have their upper and lower ends merging with the top wall 22 and bottom wall 24, respectively. A vertically disposed back web merges with the Itop and bottom walls 22 and 24 and has its inboard and outboard edges joined to connecting webs 72 and 73, respectively, which are'connected to the adjacent edges of the guide webs 69 and 70, respectively.

, The guide webs69 and 70 are formed with coplanar diagonal guide ksurfaces 71-71for engagement against complementary ysurfaces formed on the upper shoe 65, and are also formed with coplanar diagonal guide surfaces 71a-71a for engagement against complementary surfaces Yformed on the lower -shoe 65. The guide snrfaces 71 and 71a on eachguide web diverge toward the side wall 28 to direct the `shoes ',65-65 into engagement pression spring 73a. The shoes 65--65Y are formed-with pockets 7474, to receiv e;the ends of the spring 73a which acts to urge the shoes away from eachother and against the wear plate 3V9to cause the bolster to move laterally and engage the shoe 34 against the wear plate 38.- This form of the invention is otherwise similar to the form heretofore shown and described and corresponding compression and tension members'77i'and` 78 and `spaced columns 79 and 80, said members andk columns defining an opening 81 to receive the end of av bolster 82 theside walls havingwear plates 87 and 38 secured thereto. Inboard andnoutboard guide lugs 89-89 Vand V90--90 are provided on the side walls of the bolster to straddle the columns 79 and 80.

The column 79 is formed with a pocket 91 to receive a Y friction shoe 92 having a flat surface l93 to engage the Vwear plate 87. The pocket 91 is defined byspaced side walls 94--94 and top and back walls 96 and 97 extending therebetween. Spaced diagonal guide webs 98-98 are joined to the side walls 94-94 and back wall 97 and fformed with coplanar guide surfaces'99-99-for engagement against complementary surfaces formed on opposite sides of the shoe 92.` A pocket 101 is formed in the shoe 92 to receive the lower end of a compression spring y 102 having its upper end seated againsty the Ibottom face of thel top wall 96.

The column 80 is formed with a pocket 103 to receive a shoe 104 having a at front surface 10S engaging the mentary surfaces 109-109 formed on the shoe 104.` v

In the operationV of the snubbing means illustrated in Figures and 6 in the drawings, the spring 102 acts means for bothl of said shoes and said spring means acting ling reference numbersihave been applied'to corresponding parts. i

' Figures `5V and y6 illustrate another modified form of the invention in which-a side frame76 is shown as compris- `wear plate S8. The pocket 103 is defined by spaced side walls 106--106, a back wall 107, and outwardly diverging "walls 10S-108 having flat front faces to engage complethrough the shoe 9,2 to wedge the bolster laterallyto"vvk vengage the wear plate v88 against the shoe 104, and thus serves to maintain both of the shoes in engagement with their respective wear plates during Vvertical movement of the bolster 82 relative to the side lframe .76.'

While this invention has been shown in several forms it is obvious to those skilled in the art-that it is not so limited `vbut is susceptible of various changes and modifications without departing from vthe spirit and scope of the claimed invention. I claim:

1. In a railway car truck, a'side frame having spaced 'columns with substantially vertical friction surfaces partly defining a bolster opening, a bolster spring-supported in said opening, top and bottom wedge surfaces within the jbolster diverging toward one of said friction surfaces,

said wedge surfaces converging toward the longitudinal axis of the bolster, a friction shoe engaged with said wedge surfaces and said one friction surface, another wedge surface on said bolster facing the other friction surface and arranged at an angle with respect thereto, said other wedge surface and one of said rst mentioned wedge Vsurfaces converging with respect to each other toward said axis, another shoe engageable with said other wedge surface and said other friction surface, and spring means whereby the rst mentioned shoe is urged againstrsaid one friction surface, said spring means being the sole actuating on the irst-mentionedshoe only through the first mentioned wedge surfaces.

2. In a railway car truck, a side frame having spaced columns partly defining a bolster opening, a bolster structure spring-supported in said opening, friction means carried by said structure in engagement with one column along a substantially vertical surface thereof, a substantially vertical friction surface on the other column, said surfaces facing each other and being substantially parallel, a wedge surface on the bolster structure arranged diagonally with respect to the surface of said other column, a friction shoe having faces engageable, respectively, with the last mentioned surface and with said wedge surface, and spring means carried by the bolster structure for urging said shoe faces against the related surfaces and thereby urging said friction means againstvthe first mentioned surface, saidspring means being the sole actuating means for said shoe and for said friction means, and said spring means acting on said friction means only by forceexerted -'by said shoe against said wedge surface.

3.- ln a railway car truck, a side frame having spaced columns partly defining a bolster opening, a bolster structure in said opening, said bolster structure having top and 'bottom diagonal surfaces diverging vtoward one of the columns, `a friction shoe having diagonal faces diverging toward said o-ne column and seated against respective surfaces, said shoe having a substantially vertical friction face engageable with a substantially vertical surface of other column along a substantially vertical surface thereof, and spring means compressed against said other shoe kto wedge it against said other surface and said last mentioned column surface thereby urging said top and bottom surfaces toward said one column and against the re-y lated faces ofthe rstmentioned `shoe `wherebythe fricl tion surface of the rst mentioned shoe isurged against the surface of said one column, said spring means being the sole actuating means for both shoes andy said spring means acting on the first mentioned shoe only by force exerted by said other shoe against said other surface.

4. In a railway car truck, a side frame having spaced columns with opposed mutually facing substantially vertical friction surfaces, a bolster spring-supported between said columns, a substantially vertical friction faceV carried by the bolster for vertical movement in unison therewith, said face being engaged with one of the surfaces, and a friction device carried by the bolster for vertical movement in unison therewith, said device comprising a shoe with a substantially vertical friction face engageable with the 'other surface, and said device comprising spring means for urging the shoe face against said other surface thereby moving the bolster laterally thereof toward said one column surface` to urgesaid rst mentioned face against said one column surface, said spring means being the sole actuating means for said shoe and for said first mentioned face and actuating the latter only by reaction of the'device against the bolster.

5, In a railway car truck, a side frame having spaced columns with opposed mutually facing substantially vertical friction surfaces, a bolster spring-supported between ysaid columns, a substantiallly vertical friction face carriedby the bolster for verticalv movement therewith, said face being engaged with one of the surfaces, and a fric- 'tion deviceV carried bythe bolster for vertical movement therewith, said device comprising a pair of shoes engageable with wedge surfaces of the bolster diverging toward the other friction surface, and said device comprising spring means compressed between said shoes to urge them against respective wedge surfaces and against said other vfriction* surface, said spring means being the sole `actuating means for said shoes and for said friction face and actuating the latter only by force exerted against said wedge faces by respective shoes.

6. In a railway car truck, a side frame having spaced columns with opposed mutually facing friction surfaces, a bolster between said columns, a friction face carried by the bolster for vertical movement therewith, said face being engaged with one of the surfaces, and a friction device carried by the bolster for vertical movement therewith, said device comprising a shoe with a friction face engageable with the other surface, and said device comprising spring means for urging the shoe face against said other surface thereby moving the bolster laterally thereof to urge said first mentioned face against said one surface, said spring means being the sole actuating means for said shoe and said rst mentioned face and actuating the latter only by reaction of said device against the bolster.

7. A railway car truck according to claim 6, wherein the rst mentioned friction face is readily removable from the bolster when the latter is removed from between said columns.

8. A railway car truck according to claim 7, wherein the removable friction face is held in assembled relationship with the bolster by `reaction of the device thereagainst.

References Cited in the le of this patent UNITED STATES PATENTS 

